CN105006264A - High temperature gas-cooled reactor helium purification regeneration system and regeneration method - Google Patents
High temperature gas-cooled reactor helium purification regeneration system and regeneration method Download PDFInfo
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- CN105006264A CN105006264A CN201510417057.6A CN201510417057A CN105006264A CN 105006264 A CN105006264 A CN 105006264A CN 201510417057 A CN201510417057 A CN 201510417057A CN 105006264 A CN105006264 A CN 105006264A
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Abstract
The present invention relates to a high temperature gas-cooled reactor helium purification regeneration system and a regeneration method. The regeneration system comprises a diaphragm compressor, an electric heater, a water/helium cooler 1, a gas/water separator, an auxiliary water adsorption bed, and a vacuum device with a built-in discharge pipeline. A bypass is further disposed at the auxiliary water absorption bed. All the devices form: a regeneration loop of a copper oxide bed of a helium purification system, a regeneration loop of a molecular sieve bed of the helium purification system, a regeneration loop of an auxiliary water adsorption bed, and a regeneration loop of a low-temperature activated carbon bed of the helium purification system; and an oxygen injecting device is disposed on the regeneration hoop of the copper oxide bed. Through the four regeneration loops, high-efficient regeneration is achieved for the copper oxide bed, the molecular sieve bed, and the low-temperature activated carbon bed of the helium purification system; a problem of freeze-blockage in a cryogenic helium/helium heat exchanger of the helium purification system is solved; the runtime of the high temperature gas-cooled reactor helium purification system is prolonged; and high-efficient operation of the high temperature gas-cooled reactor helium purification system is ensured.
Description
Technical field
The present invention relates to a kind of high temperature gas cooled reactor helium purification regenerative system and renovation process, belong to nuclear reactor technology field.
Background technology
High temperature gas cooled reactor is take graphite as moderator, helium has the advanced reactor of inherent safety features for cooling medium.Number of chemical impurity is had and radioimpurity radioactive impurity enters in primary Ioops helium coolant, as carbon monoxide, hydrogen, carbon dioxide, water, oxygen, nitrogen, methane and to be fissioned by fuel sphere and gaseous state tritium and the radioimpurity radioactive impurity such as krypton, xenon of thermal neutron activated generation occur in-pile component in operational process.For making reactor graphite and in-pile component can not excessive corrosion, the discharge to environment of chemistry in primary Ioops helium coolant and radioimpurity radioactive impurity level and radioactive waste need be controlled.A set of Helium purification system is set usually in high temperature gas cooled reactor and controls chemistry and radgas impurity level in helium coolant.Usually set gradually CuO bed, molecular sieve bed and low temperature active charcoal bed in Helium purification system, it can purify chemistry and radgas impurity in helium, and collects tritium-containing liquid waste and drain into active-effluent system.Wherein hydrogen, tritium, carbon monoxide are mainly oxidized to water, HTO and carbon dioxide by CuO bed respectively, and remove trace oxygen; Molecular sieve bed is used for planar water, HTO and carbon dioxide; Low temperature active charcoal bed at about-196 DEG C for adsorbing and removing nitrogen, methane, radioactive nuclide krypton, xenon and remaining gas impurity.CuO bed in Helium purification system, molecular sieve bed and low temperature active charcoal bed are intermittently operated, when CuO bed, molecular sieve bed and low temperature active charcoal bed normal purge outlet gaseous impurities component arrive breakthrough point, then the whole purification row of tackling Helium purification system regenerate.
But, existing Helium purification system and helium purification regenerative system exist Helium purification system working time short, Helium purification system low temperature helium/helium heat exchanger place's frozen block and tritium-containing liquid waste to the problem of CuO bed and the diffusion of low temperature active charcoal bed regenerative circuit.Therefore, be necessary to improve existing helium purification regenerative system, regenerate with the better whole purification row to Helium purification system.
Summary of the invention
In order to solve the problems referred to above that existing helium purification regenerative system exists, the invention provides a kind of high temperature gas cooled reactor helium purification regenerative system, by newly surging/and helium refrigeratory 2 is gentle with Yuan Shui/helium refrigeratory 1/separator bypass in parallel, and tritium-containing liquid waste can be avoided to CuO bed and the diffusion of low temperature active charcoal bed regenerative circuit; And regeneration operation method is provided, realize the highly efficient regeneration to Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed cleaning equipment, solve Helium purification system low temperature helium/helium heat exchanger frozen block problem and extend high temperature gas cooled reactor Helium purification system working time, ensureing the Effec-tive Function of high temperature gas cooled reactor Helium purification system.
To achieve these goals, the present invention adopts following technical scheme:
A kind of high temperature gas cooled reactor helium purification regenerative system, comprise diaphragm type compressor, electric heater, water/helium refrigeratory 1, gas/separator, auxiliary water adsorbent bed, in establish the vacuum extractor unloading and put pipeline; Wherein, a bypass is also established at auxiliary water adsorbent bed place;
Regenerative circuit, the regenerative circuit of Helium purification system molecular sieve bed, the regenerative circuit of auxiliary water adsorbent bed, the regenerative circuit of Helium purification system low temperature active charcoal bed of Helium purification system CuO bed can be formed by each device;
Wherein, described CuO bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 1 gentle/separator connects to form successively; And an oxygen injection device is established on CuO bed regenerative circuit; When CuO bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
Wherein, the regenerative circuit of described molecular sieve bed is connected to form successively by diaphragm type compressor, electric heater, Helium purification system molecular sieve bed, water/helium refrigeratory 1, gas/separator and auxiliary water adsorbent bed;
Wherein, the regenerative circuit of described auxiliary water adsorbent bed is connected to form successively by diaphragm type compressor, electric heater, auxiliary water adsorbent bed, water/helium refrigeratory 1, gas/separator;
Wherein, described low temperature active charcoal bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 1 gentle/separator connects to form successively; When low temperature active charcoal bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
Wherein, described CuO bed regenerative circuit, molecular sieve bed regenerative circuit, auxiliary water regeneration of adsorbent beds loop, low temperature active charcoal bed regenerative circuit are equipped with vacuum extractor.
The present invention utilizes four regenerative circuits, realize the highly efficient regeneration to Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed cleaning equipment, solve Helium purification system low temperature helium/helium heat exchanger frozen block problem and extend high temperature gas cooled reactor Helium purification system working time, ensureing the Effec-tive Function of high temperature gas cooled reactor Helium purification system.
In regenerative system of the present invention, water/helium refrigeratory 1 gentle/separator place also can establish one with the bypass of water/helium refrigeratory 2, and obtain thus connecting to form CuO bed regenerative circuit successively by diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 2; Utilize the bypass of water/helium refrigeratory 2, also can obtain the low temperature active charcoal bed regenerative circuit connected to form successively by diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 2.When low temperature active charcoal bed regenerates, preferably utilize the regenerative circuit containing water/helium refrigeratory 2, can avoid water/helium refrigeratory 1 gentle/separator in tritium-containing liquid waste spread to low temperature active charcoal bed regenerative circuit.When low temperature active charcoal bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
In regenerative system of the present invention, described oxygen injection device is preferably arranged on Helium purification system CuO bed import or export place.When CuO bed regenerates, preferably utilize the regenerative circuit containing water/helium refrigeratory 2 to regenerate, can avoid water/helium refrigeratory 1 gentle/separator in tritium-containing liquid waste spread to CuO bed regenerative circuit.When CuO bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
In regenerative system of the present invention, described vacuum extractor is preferably located at auxiliary water adsorbent bed exit, so that collect tritium-containing liquid waste and avoid high dose tritium-containing liquid waste to the discharge of environment.
In regenerative system of the present invention, the recovery stream of molecular sieve bed, to preferably flowing to contrary with normally purifying to run, regenerating operational efficiency for improving Helium purification system molecular sieve bed, avoiding the planar water in molecular sieve bed to be shifted to low concentration region by high concentration region.
In regenerative system of the present invention, described auxiliary water adsorbent bed is used for removing water and HTO, and the adsorbent loaded has strong absorption affinity to water, HTO.
In regenerative system of the present invention, described auxiliary water adsorbent bed preferably loads all types of zeolite adsorbent such as 3A, 4A, 5A, 10X, 13X.
The present invention also provides a kind of renovation process utilizing above-mentioned helium purification regenerative system, when high temperature gas cooled reactor Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed export certain gaseous impurities component arrival breakthrough point, must regenerate respectively Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed.
Wherein, the concrete steps of Helium purification system molecular sieve bed regeneration are: a) transfer, b) the auxiliary water regeneration of adsorbent beds of molecular sieve bed tritium-containing liquid waste and molecular sieve bed carbon dioxide desorption.
Wherein, the transfer of described a) molecular sieve bed tritium-containing liquid waste is specially: form molecular sieve bed regenerative circuit, and fill helium to low pressure to molecular sieve bed regenerative circuit, starts helium purification regenerative system diaphragm type compressor, then starts helium purification regenerative system electric heater; Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, molecular sieve bed is regenerated under the high temperature conditions, enter helium purification regenerative system water/helium refrigeratory 1 from molecular sieve bed hot helium out and after cooling, enter helium purification regenerative system gas/separator, the condensation in gas/separator of saturated tritium-containing liquid waste is collected, and unsaturated tritium-containing liquid waste enters auxiliary water adsorbent bed and adsorbed; Tritium-containing liquid waste in Helium purification system molecular sieve bed is transferred in helium purification regenerative system gas/separator and auxiliary water adsorbent bed.
Wherein, preferably, in molecular sieve bed tritium-containing liquid waste transfer process, described lower pressure is 0.5MPa-0.75MPa; Described molecular sieve bed regeneration temperature is 200-350 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory.
In molecular sieve bed tritium-containing liquid waste transfer step, carbon dioxide can simultaneously from molecular sieve bed desorption, molecular sieve bed regenerative circuit pressure is caused to raise, now to carry out the operation of regenerative circuit exhaust pressure relief in time, for avoiding high dose tritium-containing liquid waste to the discharge of environment, pressure release must be exhausted from the outlet of auxiliary water adsorbent bed.
Wherein, described b) auxiliary water regeneration of adsorbent beds is specially: treat that the transfer of molecular sieve bed tritium-containing liquid waste terminates, Helium purification system molecular sieve bed and helium purification regenerative system are isolated, and form auxiliary water regeneration of adsorbent beds self circular loop; In auxiliary water regeneration of adsorbent beds loop, fill helium to low pressure, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater; Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, auxiliary water adsorbent bed is regenerated under the high temperature conditions, enter helium purification regenerative system water/helium refrigeratory 1 from auxiliary water adsorbent bed hot helium out and after cooling, enter helium purification regenerative system gas/separator, make the tritium-containing liquid waste in auxiliary water adsorbent bed be transferred to helium purification regenerative system gas/separator place, final high temperature gas cooled reactor tritium-containing liquid waste enters Spent Radioactive water system; Last accessory molecule sifting bed is cooled to room temperature;
Wherein, preferably, in auxiliary water regeneration of adsorbent beds process, described lower pressure is 0.5MPa-0.75MPa; Described auxiliary water regeneration of adsorbent beds temperature is 200-350 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory.
Wherein, described b) molecular sieve bed carbon dioxide de is attached to be specially: treat that molecular sieve bed tritium-containing liquid waste transfer step terminates, close helium purification regenerative system diaphragm type compressor, helium purification regenerative system electric heater, isolation helium purification regenerative system water/helium refrigeratory 1, helium purification regenerative system gas/separator and auxiliary water adsorbent bed, make molecular sieve bed regenerative circuit and molecular sieve bed pressure release and vacuumize, by clean for the carbon dioxide eliminating in molecular sieve bed; Finally, molecular sieve bed regenerative circuit and molecular sieve bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa.
Wherein, preferably, in molecular sieve bed carbon dioxide desorption process, described pressure release also vacuumizes actual conditions and is: molecular sieve bed is evacuated to lower than 100Pa at 100 DEG C-200 DEG C.
Wherein, the concrete steps of Helium purification system CuO bed regeneration are: form CuO bed regenerative circuit, and helium is filled to low pressure in CuO bed regenerative circuit, start helium purification regenerative system diaphragm type compressor, then helium purification regenerative system electric heater is started, helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, cupric oxide reactive inlet temperature is made to reach 80 DEG C, in CuO bed regenerative circuit, oxygen is injected by oxygen injection device, when solid brass bed reactivation outlet to be oxidized has an obvious oxygen penetration, the operation of CuO bed note oxygen terminates, closing helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, CuO bed regenerative circuit and CuO bed pressure release, to vacuumize and to fill helium for subsequent use to being greater than 0.11MPa.
Wherein, preferably, in Helium purification system CuO bed regenerative process, described lower pressure is 0.5MPa-0.75MPa; Described CuO bed, in note oxygen process, regulates note oxygen flow to make CuO bed temperature be no more than 300 DEG C; Described helium purification regenerative system water/helium refrigeratory working temperature is 5 DEG C-25 DEG C.
Wherein, the concrete steps of Helium purification system low temperature active charcoal bed regeneration are: form low temperature active charcoal bed regenerative circuit, and helium is filled to low pressure in low temperature active charcoal bed regenerative circuit, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater.Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, low temperature active charcoal bed is regenerated under the high temperature conditions, after low temperature active charcoal bed hot helium gas cooling out, gets back to the abundant desorption of absorbed component that diaphragm type compressor import makes Helium purification system low temperature active charcoal bed; Close helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, make low temperature active charcoal bed regenerative circuit and the bed pressure release of low temperature active charcoal and vacuumize; Finally, low temperature active charcoal bed regenerative circuit and low temperature active charcoal bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa.
Wherein, preferably, in the process of Helium purification system low temperature active charcoal bed regeneration, described lower pressure is 0.5MPa-0.75MPa; Described low temperature active charcoal bed regeneration temperature is 100-300 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory; Described pressure release also vacuumizes actual conditions and is: low temperature active charcoal bed is evacuated to lower than 100Pa at 100 DEG C-300 DEG C; Wherein, preferred low temperature active charcoal bed vacuumizes, to save energy consumption at 100-150 DEG C.
In low temperature active charcoal bed regenerative process, due to absorbed component desorption from activated charcoal, the supercharging of low temperature active charcoal bed regenerative circuit can be caused, now should in time to the pressure release of low temperature active charcoal bed regenerative circuit; Chemistry in low temperature active charcoal bed regenerative circuit and radgas enter waste gas system.
Adopt helium purification regenerative system of the present invention and renovation process, the highly efficient regeneration of high temperature gas cooled reactor Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed can be realized, avoid high dose tritium-containing liquid waste to Helium purification system CuO bed and the diffusion of low temperature active charcoal bed regenerative circuit; Improve Helium purification system molecular sieve bed regeneration efficiency, realize water and carbon dioxide from the efficient desorption molecular sieve bed, effectively avoid high dose tritium-containing liquid waste to environmental emission, solve Helium purification system low temperature helium/helium heat exchanger frozen block problem and extend high temperature gas cooled reactor Helium purification system working time, ensure the Effec-tive Function of high temperature gas cooled reactor Helium purification system, industrialization is realized to high temperature gas cooled reactor technology significant.
Accompanying drawing explanation
Fig. 1 is high temperature gas cooled reactor helium purification regenerative system structural representation of the present invention.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In the present invention, Helium purification system is summarized as follows helium coolant purification process in high temperature gas cooled reactor primary Ioops:
The cooling medium helium of primary Ioops flows into high temperature gas cooled reactor Helium purification system with 5%/h flow, Helium purification system on-stream pressure and high temperature gas cooled reactor primary Ioops pressure close, on-stream pressure is 3-9MPa.Remove solid particle through dust filtrator, be heated to 250 DEG C by Helium purification system electric heater, enter in CuO bed and hydrogen and carbon monoxide are oxidized to water and carbon dioxide (tritium is oxidized to HTO) respectively, and remove trace oxygen; In passing through, warm helium/helium heat exchanger and water/helium refrigeratory are cooled to 10 DEG C, then enter molecular sieve bed absorption and fall water, HTO and carbon dioxide; Be cooled to about-160 DEG C by low temperature helium/helium heat exchanger again, enter low temperature active charcoal bed adsorbing and removing nitrogen, methane and radioactive nuclide Kr, Xe etc. and remaining gas impurity at about-196 DEG C.Low temperature active charcoal bed outlet helium returns high temperature gas cooled reactor primary Ioops successively or after low temperature helium/helium heat exchanger backheat, enters the helium hold-up tank of Helium auxiliary system after low temperature helium/helium heat exchanger and middle temperature helium/helium heat exchanger backheat.
Embodiment 1 one kinds of high temperature gas cooled reactor helium purification regenerative systems
A kind of high temperature gas cooled reactor helium purification regenerative system, as shown in Figure 1, comprise diaphragm type compressor, electric heater, water/helium refrigeratory 1, gas/separator, auxiliary water adsorbent bed, in establish the vacuum extractor unloading and put pipeline; Wherein, a bypass is also established at auxiliary water adsorbent bed place;
Regenerative circuit, the regenerative circuit of Helium purification system molecular sieve bed, the regenerative circuit of auxiliary water adsorbent bed, the regenerative circuit of Helium purification system low temperature active charcoal bed of Helium purification system CuO bed can be formed by each device;
Wherein, described CuO bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 1 gentle/separator connects to form successively; And an oxygen injection device is established on CuO bed regenerative circuit; When CuO bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
Wherein, the regenerative circuit of described molecular sieve bed is connected to form successively by diaphragm type compressor, electric heater, Helium purification system molecular sieve bed, water/helium refrigeratory 1, gas/separator and auxiliary water adsorbent bed;
Wherein, the regenerative circuit of described auxiliary water adsorbent bed is connected to form successively by diaphragm type compressor, electric heater, auxiliary water adsorbent bed, water/helium refrigeratory 1, gas/separator;
Wherein, described low temperature active charcoal bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 1 gentle/separator connects to form successively; When low temperature active charcoal bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
Wherein, described CuO bed regenerative circuit, molecular sieve bed regenerative circuit, auxiliary water regeneration of adsorbent beds loop, low temperature active charcoal bed regenerative circuit are equipped with vacuum extractor.
Wherein, described vacuum means is set in auxiliary water adsorbent bed exit.
Wherein, described oxygen injection device is arranged on Helium purification system CuO bed import or export place.
Wherein, described auxiliary water adsorbent bed is used for removing water and HTO, and the adsorbent loaded has strong absorption affinity to water, HTO.The all types of zeolite adsorbents such as the described filling of auxiliary water adsorbent bed 3A, 4A, 5A, 10X, 13X.
Embodiment 2
A kind of high temperature gas cooled reactor helium purification regenerative system, similar to regenerative system described in embodiment 1, difference is only: water/helium refrigeratory 1 gentle/separator place also can establish one with the bypass of water/helium refrigeratory 2.
After improvement, described CuO bed regenerative circuit is connected to form successively by diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 2.When CuO bed regenerates, utilize and regenerate containing the regenerative circuit of water/helium refrigeratory 2, can avoid water/helium refrigeratory 1 gentle/separator in tritium-containing liquid waste spread to CuO bed regenerative circuit.When CuO bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
After improvement, described low temperature active charcoal bed regenerative circuit is connected to form successively by diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 2.When low temperature active charcoal bed regenerates, utilize containing the regenerative circuit of water/helium refrigeratory 2, can avoid water/helium refrigeratory 1 gentle/separator in tritium-containing liquid waste spread to low temperature active charcoal bed regenerative circuit.When low temperature active charcoal bed regenerative circuit has water to exist, auxiliary water adsorbent bed can be utilized to remove.
Embodiment 3 one kinds of high temperature gas cooled reactor Helium purification system regeneration technologies
A kind of renovation process utilizing helium purification regenerative system described in above-described embodiment 2:
Under high temperature gas cooled reactor Helium purification system accidental conditions, Helium purification system working pressure is 3-7MPa, and CuO bed operating temperature is about 250 DEG C, and molecular sieve bed operating temperature is about 10 DEG C, and low temperature active charcoal bed operating temperature is about-196 DEG C;
When CuO bed, molecular sieve bed and low temperature active charcoal bed export certain gaseous impurities component arrival breakthrough point, must regenerate respectively Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed;
The regeneration of described Helium purification system CuO bed:
Form CuO bed regenerative circuit, and in CuO bed regenerative circuit, fill helium to about 0.6MPa, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater, arranging helium purification regenerative system water/helium refrigeratory 2 working temperature is 10 DEG C.Helium, under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, makes CuO bed reactive inlet temperature reach 80 DEG C, normally purifies porch inject oxygen by oxygen injection device at CuO bed.Inject oxygen process, regulate note oxygen flow to make CuO bed temperature be no more than 300 DEG C.When solid brass bed reactivation outlet to be oxidized has an obvious oxygen penetration, the operation of CuO bed note oxygen terminates.Closing helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, CuO bed regenerative circuit and CuO bed pressure release, to vacuumize and to fill helium for subsequent use to being greater than 0.11MPa.
The regeneration of described Helium purification system molecular sieve bed:
Specifically comprise: the transfer of (1) molecular sieve bed tritium-containing liquid waste; (2) auxiliary water regeneration of adsorbent beds and molecular sieve bed carbon dioxide desorption.
Wherein, (1) molecular sieve bed tritium-containing liquid waste transfer step comprises:
Form molecular sieve bed regenerative circuit, and fill helium to about 0.6MPa to molecular sieve bed regenerative circuit, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater.Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, molecular sieve bed regeneration temperature is made to reach 250 DEG C, then enter helium purification regenerative system water/helium refrigeratory 1 and be cooled to 10 DEG C, the condensation in gas/separator of saturated tritium-containing liquid waste is collected, and unsaturated tritium-containing liquid waste enters auxiliary water adsorbent bed and adsorbed; Tritium-containing liquid waste in Helium purification system molecular sieve bed is transferred in helium purification regenerative system gas/separator and auxiliary water adsorbent bed.In molecular sieve bed tritium-containing liquid waste transfer process, the carbon dioxide of molecular sieve bed absorption can in pipe system, cause the pressure of molecular sieve bed regenerative circuit to raise, now export timely pressure release to ensure regular regeneration working pressure from auxiliary water adsorbent bed by desorption simultaneously.
(2) auxiliary water regeneration of adsorbent beds step comprises:
Treat that the transfer of molecular sieve bed tritium-containing liquid waste terminates, Helium purification system molecular sieve bed and helium purification regenerative system are isolated, and forms auxiliary water regeneration of adsorbent beds self circular loop.In auxiliary water regeneration of adsorbent beds loop, fill helium to about 0.6MPa, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater.Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, auxiliary water regeneration of adsorbent beds temperature is made to reach 250 DEG C, then enter helium purification regenerative system water/helium refrigeratory 1 and after being cooled to 10 DEG C, enter helium purification regenerative system gas/separator, make the tritium-containing liquid waste in auxiliary water adsorbent bed be transferred to helium purification regenerative system gas/separator place, final high temperature gas cooled reactor tritium-containing liquid waste enters Spent Radioactive water system; Treat that auxiliary water regeneration of adsorbent beds terminates, close helium purification regenerative system electric heater, make auxiliary water adsorbent bed be cooled to room temperature.
Molecular sieve bed carbon dioxide desorption step comprises:
Treat that molecular sieve bed tritium-containing liquid waste transfer step terminates, close helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, isolation helium purification regenerative system water/helium refrigeratory 1, gas/separator and auxiliary water adsorbent bed, make molecular sieve bed regenerative circuit and molecular sieve bed pressure release and vacuumize.Molecular sieve bed is evacuated to lower than 100Pa at 150 DEG C, by clean for the carbon dioxide eliminating in molecular sieve bed.Finally, molecular sieve bed regenerative circuit and molecular sieve bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa.
The regeneration of described Helium purification system low temperature active charcoal bed:
Form low temperature active charcoal bed regenerative circuit, and in low temperature active charcoal bed regenerative circuit, fill helium to about 0.6MPa, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater.Make low temperature active charcoal bed regeneration temperature reach 150 DEG C, then enter helium purification regenerative system water/helium refrigeratory 2 and be cooled to 10 DEG C, make the abundant desorption of absorbed component in Helium purification system low temperature active charcoal bed.In low temperature active charcoal bed regenerative process, due to absorbed component desorption from activated charcoal, the supercharging of low temperature active charcoal bed regenerative circuit can be caused, now should enter radioactive emission system to the pressure release of low temperature active charcoal bed regenerative circuit in time.Low temperature active charcoal bed regenerative circuit and the bed pressure release of low temperature active charcoal also vacuumize, and low temperature active charcoal bed is evacuated to lower than 100Pa at 150 DEG C.Chemistry in low temperature active charcoal bed regenerative circuit and radgas enter waste gas system, and last low temperature active charcoal bed regenerative circuit and low temperature active charcoal bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa.
Adopt above-mentioned high temperature gas cooled reactor helium purification regenerative system and regeneration technology that tritium-containing liquid waste can be avoided to CuO bed and the diffusion of low temperature active charcoal bed regenerative circuit; And regeneration operation method is provided, realize the highly efficient regeneration to Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed cleaning equipment, solve Helium purification system low temperature helium/helium heat exchanger frozen block problem and extend high temperature gas cooled reactor Helium purification system working time, ensureing the Effec-tive Function of high temperature gas cooled reactor Helium purification system.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (10)
1. a high temperature gas cooled reactor helium purification regenerative system, is characterized in that, comprise diaphragm type compressor, electric heater, water/helium refrigeratory 1, gas/separator, auxiliary water adsorbent bed, in establish the vacuum extractor unloading and put pipeline; Wherein, a bypass is also established at auxiliary water adsorbent bed place;
Described each device forms four regenerative circuits: the regenerative circuit of the regenerative circuit of Helium purification system CuO bed, the regenerative circuit of Helium purification system molecular sieve bed, auxiliary water adsorbent bed, the regenerative circuit of Helium purification system low temperature active charcoal bed;
Wherein, described CuO bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 1 gentle/separator connects to form successively; And an oxygen injection device is established on CuO bed regenerative circuit;
Wherein, the regenerative circuit of described molecular sieve bed is connected to form successively by diaphragm type compressor, electric heater, Helium purification system molecular sieve bed, water/helium refrigeratory 1, gas/separator and auxiliary water adsorbent bed;
Wherein, the regenerative circuit of described auxiliary water adsorbent bed is connected to form successively by diaphragm type compressor, electric heater, auxiliary water adsorbent bed, water/helium refrigeratory 1, gas/separator;
Wherein, described low temperature active charcoal bed regenerative circuit by diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 1 gentle/separator connects to form successively;
Wherein, described CuO bed regenerative circuit, molecular sieve bed regenerative circuit, auxiliary water regeneration of adsorbent beds loop, low temperature active charcoal bed regenerative circuit are equipped with vacuum extractor.
2. regenerative system according to claim 1, is characterized in that, water/helium refrigeratory 1 gentle/separator place also can establish one with the bypass of water/helium refrigeratory 2; By the CuO bed regenerative circuit that diaphragm type compressor, electric heater, Helium purification system CuO bed, water/helium refrigeratory 2 connect to form successively; And by low temperature active charcoal bed regenerative circuit that diaphragm type compressor, electric heater, Helium purification system low temperature active charcoal bed, water/helium refrigeratory 2 connect to form successively.
3. regenerative system according to claim 1 and 2, is characterized in that, described oxygen injection device is arranged on Helium purification system CuO bed import or export place.
4. regenerative system according to claim 1 and 2, is characterized in that, described vacuum means is set in auxiliary water adsorbent bed exit.
5., according to the arbitrary described regenerative system of claim 1-4, it is characterized in that, described auxiliary water adsorbent bed is used for removing water and HTO, and the adsorbent loaded has strong absorption affinity to water, HTO.
6. according to the arbitrary described regenerative system of claim 1-4, it is characterized in that, the adsorbent of described auxiliary water adsorbent bed filling is 3A, 4A, 5A, 10X, 13X type zeolite adsorbent of molecular sieve.
7. one kind utilizes the renovation process of the arbitrary described helium purification regenerative system of claim 1-6, it is characterized in that, when high temperature gas cooled reactor Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed export certain gaseous impurities component arrival breakthrough point, Helium purification system CuO bed, molecular sieve bed and low temperature active charcoal bed are regenerated respectively.
8. renovation process according to claim 7, is characterized in that, the concrete steps of described Helium purification system molecular sieve bed regeneration are: a) transfer, b) the auxiliary water regeneration of adsorbent beds of molecular sieve bed tritium-containing liquid waste and molecular sieve bed carbon dioxide desorption;
Wherein, the transfer of described a) molecular sieve bed tritium-containing liquid waste is specially: form molecular sieve bed regenerative circuit, and fill helium to low pressure to molecular sieve bed regenerative circuit, starts helium purification regenerative system diaphragm type compressor, then starts helium purification regenerative system electric heater; Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, molecular sieve bed is regenerated under the high temperature conditions, enter helium purification regenerative system water/helium refrigeratory 1 from molecular sieve bed hot helium out and after cooling, enter helium purification regenerative system gas/separator, the condensation in gas/separator of saturated tritium-containing liquid waste is collected, and unsaturated tritium-containing liquid waste enters auxiliary water adsorbent bed and adsorbed; The tritium-containing liquid waste in Helium purification system molecular sieve bed is made to be transferred in helium purification regenerative system gas/separator and auxiliary water adsorbent bed;
Wherein, preferably, in molecular sieve bed tritium-containing liquid waste transfer process, described lower pressure is 0.5MPa-0.75MPa; Described molecular sieve bed regeneration temperature is 200-350 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory;
Wherein, described b) auxiliary water regeneration of adsorbent beds is specially: treat that the transfer of molecular sieve bed tritium-containing liquid waste terminates, Helium purification system molecular sieve bed and helium purification regenerative system are isolated, and form auxiliary water regeneration of adsorbent beds self circular loop; In auxiliary water regeneration of adsorbent beds loop, fill helium to low pressure, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater; Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, auxiliary water adsorbent bed is regenerated under the high temperature conditions, enter helium purification regenerative system water/helium refrigeratory 1 from auxiliary water adsorbent bed hot helium out and after cooling, enter helium purification regenerative system gas/separator, make the tritium-containing liquid waste in auxiliary water adsorbent bed be transferred to helium purification regenerative system gas/separator place, final high temperature gas cooled reactor tritium-containing liquid waste enters Spent Radioactive water system; Last accessory molecule sifting bed is cooled to room temperature;
Wherein, preferably, in auxiliary water regeneration of adsorbent beds process, described lower pressure is 0.5MPa-0.75MPa; Described auxiliary water regeneration of adsorbent beds temperature is 200-350 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory;
Wherein, described b) molecular sieve bed carbon dioxide de is attached to be specially: treat that molecular sieve bed tritium-containing liquid waste transfer step terminates, close helium purification regenerative system diaphragm type compressor, helium purification regenerative system electric heater, isolation helium purification regenerative system water/helium refrigeratory 1, helium purification regenerative system gas/separator and auxiliary water adsorbent bed, make molecular sieve bed regenerative circuit and molecular sieve bed pressure release and vacuumize, by clean for the carbon dioxide eliminating in molecular sieve bed; Finally, molecular sieve bed regenerative circuit and molecular sieve bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa;
Wherein, preferably, in molecular sieve bed carbon dioxide desorption process, described pressure release also vacuumizes actual conditions and is: molecular sieve bed is evacuated to lower than 100Pa at 100 DEG C-200 DEG C.
9. renovation process according to claim 7, it is characterized in that, the concrete steps of described Helium purification system CuO bed regeneration are: form CuO bed regenerative circuit, and helium is filled to low pressure in CuO bed regenerative circuit, start helium purification regenerative system diaphragm type compressor, then helium purification regenerative system electric heater is started, helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, cupric oxide reactive inlet temperature is made to reach 80 DEG C, in CuO bed regenerative circuit, oxygen is injected by oxygen injection device, when solid brass bed reactivation outlet to be oxidized has an obvious oxygen penetration, the operation of CuO bed note oxygen terminates, closing helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, CuO bed regenerative circuit and CuO bed pressure release, to vacuumize and to fill helium for subsequent use to being greater than 0.11MPa,
Wherein, preferably, in Helium purification system CuO bed regenerative process, described lower pressure is 0.5MPa-0.75MPa; Described CuO bed, in note oxygen process, regulates note oxygen flow to make CuO bed temperature be no more than 300 DEG C; Described helium purification regenerative system water/helium refrigeratory working temperature is 5 DEG C-25 DEG C.
10. renovation process according to claim 7, it is characterized in that, the concrete steps of described Helium purification system low temperature active charcoal bed regeneration are: form low temperature active charcoal bed regenerative circuit, and helium is filled to low pressure in low temperature active charcoal bed regenerative circuit, start helium purification regenerative system diaphragm type compressor, then start helium purification regenerative system electric heater; Helium is under helium purification regenerative system diaphragm type compressor drives, through helium purification regenerative system electric heater, low temperature active charcoal bed is regenerated under the high temperature conditions, after low temperature active charcoal bed hot helium gas cooling out, gets back to the abundant desorption of absorbed component that diaphragm type compressor import makes Helium purification system low temperature active charcoal bed; Close helium purification regenerative system diaphragm type compressor and helium purification regenerative system electric heater, make low temperature active charcoal bed regenerative circuit and the bed pressure release of low temperature active charcoal and vacuumize; Finally, low temperature active charcoal bed regenerative circuit and low temperature active charcoal bed are lowered the temperature and to fill helium for subsequent use to being greater than 0.11MPa;
Wherein, preferably, in the process of Helium purification system low temperature active charcoal bed regeneration, described lower pressure is 0.5MPa-0.75MPa; Described low temperature active charcoal bed regeneration temperature is 100-300 DEG C; Helium is cooled to 5 DEG C-25 DEG C by described helium purification regenerative system water/helium refrigeratory; Described pressure release also vacuumizes actual conditions and is: low temperature active charcoal bed is evacuated to lower than 100Pa at 100 DEG C-300 DEG C.
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